When selecting one of K&Ns universal oval air filters, you should consider the following dimensions as they relate to the specification chart:
Mounting Flange Inside Diameter - This is the most critical dimension and should be very close to the diameter of the applications inlet flanges. The flanges will stretch up to 1/8in. for those in between sizes.
Filter Oval Dimensions - This is the length and width of the filter. Always use the largest filter practical to fit the application.
Filter Length - This dimension is the length of the filter body only, it does not include the flange length. Always use the longest filter practical, for maximum filtration.
Flange Angle and/or Length - If no angle is listed in the specifications table, the flange is straight. Any angle listed is in degrees and can be utilized when space is a problem.
Flange Type - The location of the flange in relation to the outside of the filter is sometimes offset to one edge of the filter for more clearance.
These filters are legal ONLY for racing vehicles. Not applicable, not intended for use on emission controlled street or highway vehicles.